Getting an Xstring error in VS in a C++ login program - c++

Question

I am a beginner C++ programmer. I'm trying to create a program that takes logs a user into a program, Everything compiled perfectly, but when I try to run it I get an Xstring error saying this was 0x7FF6F0AACFF0".
I suppose the error could have come from the fact that I am very new to using files in code, and I needed to use them in this program as they were the only way the login and password data could be permanently saved.
I have rewritten this project over 5 times and this is the most functional variant so far. I tried using the ofstream and ifstream but I abandoned them because only one password & login was saved per file; so I think that the main error is probably contained in the Processing and Array_filler functions, all I need is a point in the right direction and I'll probably be able to resolve it.
C++:
#include <iostream>
#include <stdlib.h>
#include <fstream>
#include <string>
using namespace std;
//bug_1 need to fix the error where the code doesn't recognize a returning user
//Project_1 need to implement a subsystem that recommends a random password & Login
//Project_2 need to implement a subsystem that requires a strong password
string Word_blip[90] = {};
string Pass_blop[90] = {};
string password;
string logWord;
string Login_1;
string Pass_1;
int KILL_SWITCH = 1;
int y = 0;
void Array_filler();
void Start_up();
void Yupper_pupper();
void processing();
void New_Login();
int main() {
Start_up();
if (KILL_SWITCH == 0) {
return EXIT_SUCCESS;
}
Yupper_pupper();
processing();
}
void Start_up() {
Array_filler();
cout << "Login:";
cin >> logWord;
cout << "Password:";
cin >> password;
for (y; y >= 90; y++) {
cout << "Preparing" << endl;
}
system("cls");
if (Word_blip[y] == logWord) {
cout << "Login accepted, welcome user:" << endl;
} else if (Word_blip[y] != logWord) {
New_Login();
}
}
void New_Login() {
string i_1_5;
cout << "Login not recognized, would you like to sign up?" << endl;
cin >> i_1_5;
if (i_1_5 == "yes") {
void Yupper_pupper();
} else if (i_1_5 == "no") {
cout << "Have a good day!" << endl;
KILL_SWITCH = 0;
} else {
cout << "That's not a valid answer ;-) please retry" << endl;
New_Login();
}
}
void Yupper_pupper() {
system("cls");
cout << "Please Sign in with your new username & Password." << endl;
cout << "New Login:";
cin >> Login_1;
cout << "New password:";
cin >> Pass_1;
void processing();
}
void processing() {
/* acts like "ofstream" or "ifstream combined; with the
ios::in and ios::out replacing the sort of "read out file"
ofstream meant with "ios::in"and the "input into file" that
ifstream provided with ios::out*/
fstream Urfile("Logins.txt", ios:: in );
string Placeholder_1;
if (Urfile.is_open()) {
getline(Urfile, Placeholder_1);
/* While Urfile = "While the file is open" Urfile = true
When the file runs out of information the file will close
making the statement false and ending the loop ;-)*/
while (Urfile) {
Placeholder_1 = Word_blip[0];
}
Urfile.close();
} else {
cout << "ERROR_OPENING_URFILE_ABORTING_PROGRAM_1" << endl;
abort();
}
fstream Myfile("Passwords.txt", ios:: in );
string Placeholder_2;
if (Myfile.is_open()) {
getline(Myfile, Placeholder_2);
while (Myfile) {
Placeholder_2 = Pass_blop[0];
}
Myfile.close();
} else {
cout << "ERROR_OPENING_MYFILE_ABORTING_PROGRAM_1" << endl;
abort();
}
Start_up();
}
void Array_filler() {
/*This function is responsible for clearing out the file
and replacing everything inside with the contents of Pass_blip and Word_blop
. Don't worry! none of the data will be lost because it was all written to the
arrays to be processed alongside the new inputs*/
fstream Urfile("Login.txt", ios::out);
if (Urfile.is_open()) {
for (int i = 0; Word_blip[i] != "\n"; i++) {
Urfile << Word_blip[i] << endl;
}
Urfile.close();
} else {
cout << "ERROR_OPENING_URFILE_ABORTING_PROGRAM_2" << endl;
abort();
}
fstream Myfile("Passwords.txt", ios::out);
if (Myfile.is_open()) {
for (int i = 0; Pass_blop[i] != "\n"; i++) {
Myfile << Pass_blop[i] << endl;
}
Myfile.close();
} else {
cout << "ERROR_OPENING_MYFILE_ABORTING_PROGRAM_2" << endl;
abort();
}
}